91results about How to "Suitable for mass production and processing" patented technology

The invention discloses a flexible cord switch for controlling an LED (Light Emitting Diode) lamp, comprising a housing and a wire connecting terminal for connecting, and an outer housing of the wire connecting terminal, wherein a button switch consisting of a button and a conducting strip is arranged inside the housing; the front end of the wire connecting terminal is a plug or a plug pin, and the back end of the wire connecting terminal is a wire riveting part; the wire connecting terminal is arranged inside the housing of the wire connecting terminal to form a connector; the connector is arranged on the housing in an inserting manner; and the front end of the plug or the plug pin of the wire connecting terminal is tightly contacted with the conducting strip. As the flexible cord switch for controlling the LED lamp adopts the structure, when wiring, the conducting wire is tightly riveted on the wire riveting part at the back end of the wire connecting terminal, then the wire connecting terminal is assembled in the housing of the wire connecting terminal to form the connector, and finally the connector is connected on the housing in an inserting manner; and when wiring, the housing is not required to be disassembled again, and a screw is not required to be screwed for fixing. The flexible cord switch is convenient and swift, is suitable for batch production and processing, and is capable of effectively improving the efficiency of wire connecting assembly; and moreover, the flexible cord switch is attractive in appearance and compact in structure.

The invention discloses a numerical control drilling and milling machine with numerical-control multi-axis double working tables. The drilling and milling machine comprises a numerical control multi-axis box (1), a lathe bed (2), a portal (3), an X-axis unit (4), an AY-axis unit (5), a BY-axis unit (6) and a Z-axis unit (7); the numerical control multi-axis box is arranged on the Z-axis unit, and is provided with a spindle motor and a plurality of telescopic rotating shafts; the telescopic rotating shafts are composed of oil cylinders (14), spline shafts (15), spline gears (17) and transition gears (18); the AY-axis unit (5) is provided with a working table A (51), and the BY-axis unit (6) is provided with a working table B (61); during work, a machine-borne numerical control electrical system carries out control, numerical control homing and numerical control knife output, collecting and changing are achieved, and shutdown is not needed; and due to the technical scheme of alternative work of the working table A and the working table B, drilling and milling machining achieves the aims that the efficiency is improved, the cost is reduced, and the machine is suitable for large-scale batch production.

The invention relates to the field of numerical control processing equipment, and in particular relates to a three-shaft numerical control deep hole drilling machine for processing a multi-deep-hole workpiece. The three-shaft numerical control deep hole drilling machine comprises a base body of a machine body, a machine head part, a chip receiving box, an air cylinder pushing and guiding device, an electric main shaft, a machine tool shield and a filter circulation chip discharge device, wherein the filter circulation chip discharge device is externally connected below the base body of the machine body; the machine head part, the chip receiving box and the electric main shaft are sequentially installed on the base body of the machine body from left to right, and the machine tool shield is arranged outside the whole body of the machine head part, the chip receiving box, the electric main shaft and the base body of the machine body; the machine head part consists of a longitudinal moving device, a vertical moving device and a clamping device; the chip receiving box is connected with the air cylinder pushing and guiding device in parallel and can slide along the left-right direction of the base body of the machine body; and the electric main shaft is provided with a center hole which can be used for introducing water to cool the electric main shaft and is controlled by a left-right moving driving device to move left and right, and cooling liquid which is introduced in the center hole is supplied by a filter circulation device. The three-shaft numerical control deep hole drilling machine adopts three shafts to control, all hole stations can be processed through one-time clamping, the processing efficiency is high, the accuracy is good, and the three-shaft numerical control deep hole drilling machine is suitable for mass processing.

The invention relates to a method for removing an incomplete thread by turning of a numerically controlled lathe based on parameters such as the diameter of a thread root, the height of the thread, the width of the thread root, thread pitch and the length of a thread head. The method comprises the following steps of: selecting an appropriate groove cutter; computing the rotational speed of a main shaft; determining cutter compensation; determining the number of machining layers; calculating cutting output of a rough machining layer and a fine machining layer; and removing the incomplete thread by rough machining and fine machining. The method is convenient and simple in operation, machining equipment is not required to be replaced during machining, and the machining of the thread and the removal of the incomplete thread can be realized; the machining quality is good, and the effect is stable; and carrying and disassembly of parts are eliminated, the machining efficiency is improved, the labor intensity of a worker and the machining cost are reduced, and the method is applicable to mass production and machining.

The invention provides a high-adaptability die for manufacturing a centrifugal impeller. According to the provided technical scheme, the die comprises a movable die body and a fixed die body. The fixed die body comprises a die core unit, and the die core unit has the longitudinal height variable. According to the technical scheme, the die has the beneficial effects that due to the fact that the die core unit has the longitudinal height variable, it means that the die core unit has a longitudinal extending or longitudinal compressing special effect in the space, a series of above technology problems caused by the unchangeable longitudinal height can be solved, especially, the die advancing step or the die retreating step can become so easy, and the technology problem that due to the change of the longitudinal height of some parts of the centrifugal impeller, manual manufacturing has to be selected can be solved; machining is more convenient, the production efficiency is higher, the die is particularly suitable for batched producing and machining, and the integrally-formed centrifugal impeller is easy to machine; and the strength of the centrifugal impeller at the time is completely decided by the material strength, and the breaking hidden danger caused by insufficient strength of connecting parts is avoided.

The invention relates to an automatic-arranging detecting device which comprises a frame, a feed hopper, a slide groove, a detecting device body and a screen plate. The feed hopper is mounted on the frame. The oblique slide groove is connected to the bottom of the feed hopper. The screen plate is located right below the tail end of the slide groove. The detecting device body is disposed above the screen plate. The screen plate comprises a magnetic core rail and a movable rotary plate. The magnetic core rail comprises a circular rail and a linear rail. The circular rail comprises a plurality of channels. The movable rotary plate is disposed in the middle of the circular rail and fixed on a rotating mechanism. The movable rotary plate is driven by the rotating mechanism to rotate clockwise. By the automatic-arranging detecting device, disordered to-be-machined magnetic core blanks can be automatically neatly arranged one by one in the linear rail to prepare for the next work procedure after being detected by the detecting device body and being screened and sorted by the multiple channels. In addition, the automatic-arranging detecting device is ingenious in structural design, high in automation level and intelligent in detecting, number of operators is reduced, blank damage is reduced, and work efficiency is increased effectively.

The invention discloses a preparation method of a titanium alloy bar for a pedicle screw. The preparation method comprises the following steps: firstly, performing rounding coarse straightening treatment on original rolled bar blanks by adopting a straight drawbench, then removing surface defects by using a flaying machine, simultaneously performing sizing determining operation at a discharge hole, straightening in a vertical electrothermal straightening mode, and finally, performing centerless grinding treatment to obtain a finished bar. According to the preparation method of the titanium alloy bar for the pedicle screw, the rounding coarse straightening treatment is performed on the rolled bar blanks by adopting the straight drawbench, and a traditional two-roll or multi-roll straightening rounding mode is replaced, so as to prevent residual stress due to coarse straightening; the residual stress generated by traditional two-roll or multi-roll fine straightening is removed by utilizing the vertical straightening mode, and the problem of necking caused by unbalanced stress of a U-shaped groove of the pedicle screw due to excessive inner stress of the titanium alloy bar prepared in the prior art is solved; the preparation method has the advantage of simplicity and is suitable for mass production and machining.

The invention discloses a flat plate array antenna for X frequency band, comprising a plurality of antenna array units. Each antenna array unit comprises a circularly-polarized cover, a tuning air cavity, a cross radiator slit, a waveguide mode type transmission cavity body, a square orthogonal mode coupler, a first strip line input terminal, and a second strip line input terminal. The tuning aircavity is disposed at the upper part of the cross radiator slit. Each slit of the cross radiator slit is arranged in a rotating manner at an interval of 90 D. The waveguide mode transmission cavity body is disposed at the lower part of the cross radiator slit. The square orthogonal mode coupler is disposed at the lower part of the waveguide mode transmission cavity body. The first strip line inputterminal is disposed at one side face of the square orthogonal mode coupler, and the second strip line input terminal is disposed at the other side face of the square orthogonal mode coupler, whereinthe two side faces are adjacent. The antenna array of the invention is advantageous in that efficiency is high, cross section is low, gain is high, wave beam is narrow, processing is easy.

The invention discloses a flowing peach kernel breaking device which comprises a bottom box; two roller gears are symmetrically and rotationally connected between the opposite inner walls of the bottom box through rotating shafts. The invention further provides a kernel breaking method for the flowing peach kernel breaking device. The kernel breaking method comprises the following steps of S1, adding a kernel, and controlling a motor to rotate forwards; S2, moving a pressing plate downward, and breaking a hull of the kernel; S3, controlling the motor to rotate reversely, performing unloading by enabling a track to displace by one circle, and resetting the pressing plate; S4, repeating above operations, and performing hull breaking in batches; S5, starting an electric push rod, and separating the kernel from hull debris; and S6, opening a sliding door, and taking out the hull-free kernel. For the flowing peach kernel breaking device, by arranging a breaking mechanism, the roller gears and the track, the kernel hull can be broken through ascending and descending of the pressing plate, the kernel and the hull debris which are subjected to breaking can be automatically unloaded at thesame time, and the kernel can be separated from the hull debris, so that the flowing peach kernel breaking device is low in labor intensity and high in processing efficiency in the processing processand is suitable for breaking kernel hulls in a large scale.

The invention discloses a processing process of an arc-shaped large plate. The processing process comprises the following steps of: (1) bending the large plate into an arc shape in a rolling manner by utilizing a rolling-bending machine and welding a large-plate skeleton into a frame structure; (2) filling foam according to the shape of the large-plate skeleton, and rolling an outer skin and an inner skin into an arc shape; and (3) pressing and molding the arc-shaped large plate by utilizing the arc-shaped large plate. The processing process disclosed by the invention has the advantages that by the mode, the arc-shaped large plate can be processed in a fast and high-efficiency manner, the outer surface of the processed arc-shaped large plate is smooth and attractive, the processing difficulty is low, the labor is saved and the processing cost is reduced.

The present invention is one kind of melamine dipped decoration paper with different patterns and its making process and application. The melamine dipped decoration paper with different patterns is made with a paper base of 5-5000 m length, and through printing and / or drawing to form texts and / or graphics, and dipping in urea-formaldehyde glue, melamine glue or melamine resin to form protective polymer layer. It is applied as the decoration material for furniture and artificial board.

The invention discloses an efficient paint spraying device for bamboo and wood product production, and relates to the technical field of machining of bamboo and wood products. A bottom plate and top boxes are included; the two top boxes are arranged; the front sides and the back sides of the bottoms of the top boxes are each fixedly connected with a supporting plate, and the bottoms of the supporting plates are fixedly connected with the top of the bottom plate; the back sides of the inner walls of the two top boxes are each fixedly connected with a first motor; one end of an output shaft of each first motor is fixedly connected a first threaded rod, and the end, away from the corresponding first motor, of each first threaded rod is rotationally connected with the front side of the inner wall of the corresponding top box; and a first slider is in threaded connection with the surface of each first threaded rod. According to the efficient paint spraying device for bamboo and wood productproduction and the process, machines replace manual work, the overall paint spraying efficiency can be improved, lots of time and vigor are saved, adaption to large-batch producing and machining is achieved, paint without being sprayed onto the bamboo and wood products is recycled and reutilized, resources are reasonably utilized, and the purpose of saving energy and protecting the environment isachieved.

The invention discloses a preparation method of an egg white solution with high foaming property. The method comprises the following steps: step 1, selecting fresh eggs, breaking egg shells, separating egg white from egg yolks, removing chalazas from an egg white solution, stirring the egg white solution at low speed of 70-90r / min using a blender for uniformly dispersing the egg white solution andthen preserving the egg white solution at 4 DEG C in a refrigerator for later use; step 2, performing irradiation treatment on the egg white solution preserved in the step 1 at ordinary temperature,wherein the irradiation dose is 15-50kGy; and step 3, performing ultrasonic treatment on the egg white solution subjected to irradiation treatment in the step 2, wherein the working time of an ultrasonic cell disruptor is 2-5s, the intermittence time is 2-5s, the ultrasonic treatment time is 3-8min and the ultrasonic power is 250-350w. The preparation method of the egg white solution with high foaming property has the beneficial effects: no chemical reagent is added in the treatment process of the method, potential safety hazard does not exist and meanwhile, and the treatment process of the method is simple, convenient and suitable for large-scale production and processing.

A 3D shoe supporter suitable for the shoes with different heights of upper is composed of two supporting plates with a connector having a toothed lateral insertion hole on their opposite surface, and a connecting rod between both supporting plates and with square insertion rod on its each end for matching with said toothed lateral insertion hole in an angle regulatable mode.

A method for processing a special-shaped PTFE supporting piece for a filter comprises the following processing steps of 1) weighing, wherein powdery or granulous PTFE resin materials of piece weight of a product are weighed; 2) rough pressing, wherein the weighed PTFE resin materials are added to a rough pressing mould cavity for mould pressing, the pressure of the mould pressing is 2-5Kg, pressure is kept for 3-5 seconds, and the rough pressing is carried out at indoor temperature; 3) sintering, wherein a billet after rough pressing is placed in a sintering furnace to be sintered, sintering temperature is 360-375 DEG C, sintering time is 6 hours, and the billet is naturally cooled to the indoor temperature; 4) fine pressing, wherein the sintered billet is placed in a fine pressing mould cavity for fine pressing forming, the pressure of the fine pressing is 3-5Kg, dwell time is 2-3 seconds, and the fine pressing is carried out at the indoor temperature; 5) burr removing. Products processed through the method are high in precision, high in quality and high in qualification rate, processing is simple, and the products are suitable for batch production and processing.

The invention discloses a processing method of a human body implant titanium alloy arc-shaped plate. The processing method comprises the following steps of raw material preparation and square setting, heating, flat rolling, vertical rolling 1, heating, bending 1, vertical rolling 2, heating, bending 2, vertical rolling 3, and finished product rolling, mechanical straightening, heat treatment, heat tension straightening and surface treatment. The processing method of the human body implant titanium alloy arc-shaped plate has the advantages that the performance of the manufactured titanium alloy arc-shaped plate is excellent, the method is suitable for large-batch production and processing, the processing precision is high, in addition, the cracking is avoided, the processing efficiency is high, the defect of insufficient intensity of a pure titanium arc-shaped plate is effectively overcome, and wider material selection conditions are provided for human body implant bone fracture plates.

This invention discloses a method for manufacturing untouching card used in smart card field and the untouching card manufactured by the method. The manufacturing method includes following steps: A. packing the module; B. making corrosion coil; C. processing the corrosion coil and the module in combination; D. laminating to make card. The untouching card manufactured by this method includes radio-frequency module, module soldering disk, polyester film, PVC card base, as well as coil and film capacitor made by corrosion, coil and film capacitor being electrically connected with the radio-frequency module on the polyester film. The advantageous effect of the invention is that the manufacturing process is simpler, the properties of the products are more stable and reliable and the consistance of the products is higher than prior art because the method of corrosion is used.

The invention discloses a different-plane structure GaAs photoconductive switch based on a graphene interface layer and a preparation process of the different-plane structure GaAs photoconductive switch. Contact electrodes are arranged on the upper surface and the lower surface of the GaAs substrate, the two contact electrodes are respectively used as an anode and a cathode of the GaAs photoconductive switch, external electrodes are arranged on the surfaces of the two contact electrodes, graphene layers are arranged between the two contact electrodes and the GaAs substrate, the upper surface of the GaAs substrate is further covered with a passivation layer, and the contact electrodes are sequentially provided with a Ni layer, a Ge layer, an Au layer, a Ni layer and an Au layer in the direction from the graphene layers to the external electrodes. High-quality graphene is transferred to the target substrate, and then the surface of the target substrate is plated with metal to form a gallium arsenide-graphene-metal composite structure, so that an electric field is homogenized, current is not concentrated, generated heat is relatively less, and the method plays a great role in heat dissipation and service life of a device.

The invention discloses radix ophiopogonis flavored syrup and a preparation method thereof. The radix ophiopogonis flavored syrup comprises the following components in percentage by weight: 10-40% ofmaltose, 30-60% of F55 high fructose corn syrup, 5-15% of radix ophiopogonis liquid, 0.02-0.2% of citric acid, 0.01-0.1% of potassium sorbate, 0-0.02% of a natural sweetener, 0-0.05% of guar gum and 0-0.1% of arabic gum. The preparation method of the radix ophiopogonis flavored syrup comprises the following steps: (1) adding water which is 20-40 times of the radix ophiopogonis, performing decoction, and performing filtering to prepare the radix ophiopogonis liquid; (2) adding the maltose, the F55 high fructose corn syrup and the radix ophiopogonis liquid to a stirring tank of 80 DEG C, and performing stirring until a dissolved state is obtained; (3) sequentially adding pre-dissolved food additives to the stirring tank, and performing heat-insulating stirring for 3 min; and (4) regulating syrup to a preset concentration. The produced radix ophiopogonis syrup is slightly yellow and bright in color, has slight medicine fragrance of the radix ophiopogonis, has the effects of clearing awayheart fire, nourishing the lung, clearing away phlegm, stopping a cough, promoting the dissipation of pathogenic water, and promoting salivation, and can be used for blending milk tea or other beverages. The mouth feel and the fragrance of original beverages can be notably improved.

The invention belongs to the technical field of gas turbines, and particularly relates to a gas turbine compressor shrouding strip of a space structure. The gas turbine compressor shrouding strip comprises a belt ring, equal sections, a moving ring and a driving device. The belt ring is in the form of a mouth table and used for the connection of the overall structural support to the outside. The multiple equal sections are arranged and evenly arranged on the belt ring and are used for changing and adjusting the throat area of the intake air. The moving ring is used for centralized linkage of the equal sections in transmission connection. The driving device is used for adjusting the moving ring through the operating parameter output by a computer to control the equal sections so as to change the amount of the intake air. By the adoption of the gas turbine compressor shrouding strip, the equal sections and the moving ring are mounted and connected together by using the belt ring in the form of the mouth table, the structure is compact and has high three-dimensionality, it is ensured that the ends of a plurality of guide vanes are on the same circumference, the roundness is good, thecombination is convenient, and the gas turbine compressor shrouding strip is suitable for mass production; and in addition, the angle change of the guide vanes can be accurately controlled, so that the guide vanes can always be kept in a reasonable position, the improvement in the performance of the compressor is guaranteed, and the power of the gas turbine is enhanced.

The invention discloses green citrus tea and a preparation method thereof, and relates to the green citrus tea. The green citrus tea adopts ingredients, including herba of suaeda glauca Bunge, immature green citrus, herba menthae, flos rosae and sweet stevia, has the efficacies on eliminating fatigue, strengthening the spleen and stomach, losing weight and nourishing skin, also has obvious healthcare functions of reducing blood fat, reducing blood pressure and reducing blood glucose, and is an ideal beverage for people suffering from hypertension, hyperlipidemia and hyperglycemia. All ingredients are mutually cooperated and accelerated, and therefore, ingredients and efficacies, which are beneficial to human bodies, are greatly improved. In the preparation method for the green citrus tea,through an auxiliary device for adding tea in the green citrus, different categories of teas can be quickly added into the immature green citrus, the time of a working procedure of adding is shortened, the damage of an immature green citrus shell is avoided, and the preparation method is suitable for the batch production and processing of the tea.

The invention provides a centrifugal impeller injection molding mold with high adaptability. According to the technical scheme provided by the invention, the centrifugal impeller injection molding mold comprises a movable mold and a static mold, wherein the static mold comprises a central post and a mold core unit; the mold core unit comprises an upper core block and a lower core block; the upper core block and the lower core block are in linkage assembly; the lower core block has longitudinal height variation; the upper core block has a transverse movement path; the transverse movement path is of a linear configuration; the central post is limited to act on the lower core block; the upper core block comprises an upper core block matching surface; the lower core block comprises a lower core block matching surface; and the upper core block matching surface and the lower core block matching surface are respectively of a plane configuration and are respectively inclined relative to the transverse movement path.

The invention discloses manufacture and assembly technology of an annular self-locking lifting hook. The technology comprises following steps: adopting precision casting technology is adopted to cast a lifting ring, a hook body, a lifting hook body, a rough block of a lifting hook lock; eliminating the casting internal stress; removing casting burr and corners by grinding; drilling the lifting ring, the hook body, the lifting hook body, the lifting hook lock, sleeving a lifting hook bolt with an external thread; finishing surfaces of the lifting ring, the hook body, the lifting hook body and the lifting hook lock, performing de-oiling, rust-removing and phosphating operation and spraying plastics with yellow electrostatic powder to surfaces; utilizing No.45 round steel to turn a connecting shaft and a lock shaft with a bluing surface on a lathe; loading the lifting ring to the lifting hook bolt of the lifting hook body, adding a spring cushion, screwing a locking nut; employing the connecting shaft to assembly the lifting hook body and the hook body together; riveting the connecting shaft; and utilizing the lock shaft to load the lifting hook lock to the upper end of the side surface of the hook body. The manufacture and assembly technology of the annular self-locking lifting hook has following beneficial effects: manufacture quality of parts and requirements of products can be ensured.

The invention discloses a method for preparing a high-strength environment-friendly brick by using waste concrete and waste plastic as raw materials through heating and pressurizing. A purpose of theinvention is to effectively solve the problem of recycling construction waste and plastic waste. The preparation method comprises the following steps: putting waste concrete into a crusher to preparerecycled concrete aggregate; blending the recycled aggregate and plastic particles; and heating and pressurizing to prepare an environment-friendly brick. According to the invention, plastic particlescan well permeate into the gaps of recycled aggregate, so that the strength of the environment-friendly brick can be greatly improved; and the method is short in concrete regeneration period, simplein production process and rich and cheap in raw material source, has wide market potential, can be widely applied to manufacturing of building materials such as standard bricks, hollow bricks, porousbricks and the like, saves resources, protects the environment, and improves the economic value of waste concrete and waste plastic.

The invention relates to spectacle lens coating cleaning equipment and a method. The device comprises a conveying guide rail and a washing basket smoothly and intermittently moving along the conveying guide rail, wherein an intermittent locating station is arranged on the conveying guide rail. Spectacle lenses are arranged in the washing basket; the washing basket does smooth and intermittent movement, and stays at the intermittent location station when passing through each working procedure of a cleaning link; an ultrasonic cleaning unit or an air drying unit arranged for each working procedure actively moves; an ultrasonic cleaning machine does lifting movement through a lifting device; the air drying unit is arranged to be in a clearance fit form; an air outlet is immobile, and a drying bin is relatively moved, so that the whole cleaning procedure is completed. The highly streamlined conveying guide rail guarantees high efficiency of production efficiency; the spectacle lenses only have change of momentum in the horizontal direction, so that the stability of coating the spectacle lenses during the cleaning process is ensured, the cleaning quality is higher, and the equipment is suitable for mass-produced processing.

The present invention provides a method for preparing functional composite material, which includes the following steps: firstly, placing the powder with functional action in a container cavity, applying field action to said powder, impregnating the powder with liquid material, finally solidifying the liquid material or firstly, placing the liquid material in the container cavity, then adding the powder with functional action into the container cavity in whith the liquid material is held, and applying field action to the power in the container cavity, and finally solidifying the liquid material. Said functional composite material can have the functions of electric conductivity, semi-conduction, superconductance, magnetism, piezoelectricity, damping, sound-absorbing, light sensation and thermal sensation, etc.

The invention discloses an integral doffing modified tailing device of a spinning polished rod spindle. The integral doffing modified tailing device comprises a yarn winding loop. A positioning sleeve which sleeves a spindle disc is arranged at one end of the yarn winding loop, and a yarn winding drum is arranged at the other end of the yarn winding loop; an end-surface circular truncated cone which is connected with the positioning sleeve is arranged at one end of the yarn winding drum, the lower end of a spool extends into the yarn winding drum, the end surface of the lower end of the spool is in contact with the end-surface circular truncated cone, and blades are arranged at the other end of the yarn winding drum. The integral doffing modified tailing device has the advantages that automatic integral doffing of the traditional spinning chopping machine can be implemented, and accordingly technical problems of high cost and low efficiency of manual doffing modes can be solved; the integral doffing modified tailing device is low in processing and manufacturing cost and suitable for production and processing on a large scale.

The invention discloses a heat conduction, heat storage and electromagnetic shielding epoxy composite material with a heterostructure and a preparation method thereof, and belongs to the technical field of electronic packaging materials. The epoxy composite material is composed of epoxy resin, modified low-melting-point alloy and modified insulating inorganic filler and is of a heterostructure, the modified insulating inorganic filler is dispersed at the top of the composite material, the modified low-melting-point alloy is dispersed at the bottom of the composite material, and the lower surface of the modified low-melting-point alloy is coated with the epoxy resin. Good heat conduction, heat storage and electromagnetic shielding performance are achieved, and the upper and lower surfaces have excellent electrical insulating properties. The epoxy composite material is prepared by taking epoxy, a curing agent and a curing accelerator as precursors, uniformly mixing the precursors, sequentially adding the modified insulating inorganic filler and the modified low-melting-point alloy, uniformly stirring, quickly removing bubbles in vacuum and curing step by step, and is simple in process route, low in cost and easy to produce on a large scale.

The invention discloses a high-flow and high-lift yellow river water diversion centrifugal pump wear-resisting ring and a preparation method thereof. According to the size of an original water pump ring, the original water pump ring is modified, a polyurethane material superior in abrasion resistance is preferred, a steel screen is embedded to increase the overall rigidity and bonding strength of the structure, and a steel-plastic composite polyurethane outer ring body is manufactured; and by the adoption of a hard alloy thick film coating technology, a water pump tungsten carbide inner ring body is manufactured. The inner ring body and the outer ring body of a water pump are used in cooperation; and compared with an ordinary carbon steel ring, the abrasion resistance is increased by more than 5 times, the service life is prolonged by more than 5 times, liquid is effectively prevented from largely flowing to a low-pressure area from a high-pressure area, long-term operation of the water pump in a high-efficiency area is ensured, the water filling amount is increased, the power consumption is reduced, and accordingly the purposes of energy saving and efficiency improving of the water pump are achieved.